Learn how configurable standardized design provides efficient solution for contaminant removal.
DRINKING WATER CASE STUDIES AND WHITE PAPERS
Encore® 700 Chemical Feed Pump Provides Reliable Metering With Minimal Maintenance For Over A Decade At One Of New York’s Largest Water Districts
Jericho Water District (JWD) is one of the largest water districts in New York, serving 58,000 people through 18,604 residential and commercial service connections on Long Island.
Challenges With Calibrating Electromagnetic Flow Meters
This article focuses on the use of electromagnetic flowmeters in the W/WW industry. It also covers Endress+Hauser’s capabilities to manufacture electromagnetic flowmeters from 1/12” to 120”, calibration, the company’s new innovative sensor with multiple sensing electrode pairs and verifying calibration in place after installation.
Proposed Defense Bill Includes Improved Focus On PFAS Control
The U.S. House of Representatives’ version of the National Defense Authorization Act (NDAA) for Fiscal Year 2021 (H.R. 6395) includes some positive developments for communities and community water systems impacted by contamination from per- and polyfluorinated substances (PFAS) used at nearby Department of Defense (DoD) installations. Here are some insights on potential benefits for water consumers in those areas.
Northshore Utility District Boosts Reading Efficiency By More Than 900 Percent, While Improving Customer Service
When Northshore Utility District began searching for a new meter reading solution in 2006, achieving a strong return on investment was a critical factor in its selection process.
Hydra-Stop’s Insta-Valve 20-24 Delivers Performance Under Pressure
Hydra-Stop’s solution kept the water running in a highly active and populated area while repairs were made.
Applied Cartridge Systems Supplies Arsenic Removal System To UMC Training Center In A Hurry
The Department of Defense's USMC Winter Warfare Training Center needed a new CA Water Board-approved system in a very short time frame.
Fuel And Fuel Additives
The fuels that propel modern society have been found in water supplies all over the world.
Portable Parallel Analysis: Streamlining Distribution System Water Testing
A Water Quality Specialist used the Hach SL1000 Parallel Portable Analyzer (PPA) to test 6 parameters simultaneously – all within about 8 minutes. Previously, the procedure took 20 minutes just for one parameter.
Bringing An END™ To RO Brine And Difficult Brackish Water Treatment
Access to clean, safe, fresh water is one of the greatest challenges facing humanity in the 21st century. By some estimates over 1.5 billion people face water scarcity issues that directly threaten their health or economic welfare on a daily basis. More concerning, the impacts of climate change and global population growth are expected to exacerbate these issues to impact over 2.3 billion people by the year 2050. These sobering facts are why six of the United Nations (UN) Sustainable Development Goals (SDGs) are focused on providing access to clean, safe water. Part of solving this challenge is reducing industrial water consumption to conserve water resources.
Accurately Measuring LNG Tanker Boil-Off Gas For Process Efficiency And Environmental Compliance
With the recent growth in demand and production of liquefied natural gas (LNG), there has been an increase in trade and the need to transport it globally via LNG tanker ships.
DRINKING WATER APPLICATION NOTES
Operations And LRV Calculations At Southwest Pipeline Project Drinking Water Treatment Facility4/14/2016
This presentation will discuss the operation of a 4 MGD pressurized two-stage Ultrafiltration (UF) plant over a 14 month period at the Oliver-Mercer-North Dunn (OMND) Drinking Water Treatment Facility, North Dakota.
The Basics: ORP and Free Chlorine Monitoring5/13/2014
Oxidation Reduction Potential or Redox is the activity or strength of oxidizers and reducers in relation to their concentration. Oxidizers accept electrons, reducers lose electrons. Examples of oxidizers are: chlorine, hydrogen peroxide, bromine, ozone, and chlorine dioxide. Examples of reducers are sodium sulfite, sodium bisulfate and hydrogen sulfide. Like acidity and alkalinity, the increase of one is at the expense of the other.
How To Install A Submersible Pump In Discharge Tubes11/28/2012
In the fields of water and waste water technology, submersible pumps represent a viable economic and technical alternative to conventional, dry-installed pumps. In particular, they offer a number of handling advantages during maintenance and installation work.
What Are You Doing To My Pipe: Can PVC Pipe Be Loaded?4/13/2021
The argument has been used that PVC pipe is delicate and can’t be subjected to any kind of loading. In EBAA's years of testing we have found that is not the case at all. PVC can take an extreme amount of strain.
Application Note: YSI Real-Time Water Quality Monitoring And The IPSWATCH-EMPACT Program12/28/2005The Ipswich and Parker Rivers watersheds lie only a short distance north of Boston, MA. The first settlements in these watersheds began in the early 1600s. Since that time, residents have relied heavily on the natural resources of the Parker and Ipswich Rivers, their coastal estuaries and Plum Island Sound, which is known as the Great Marsh. This ecosystem has been designated and protected by the Commonwealth of Massachusetts as an Area of Critical Environmental Concern (ACEC).
Flexible Expansion Joints Provide Protection For Pipelines Subject To Subtle Or Sudden Movement12/7/2020
Flex-Tend flexible expansion joints have a proven record of providing protection for pipelines subject to subtle or sudden movement. As with all products used in the water and wastewater industry, protection is optimized with the selection of the proper assembly incorporated into a sound design. This paper is intended to provide assistance in both of these areas.
Harmonics Reduction Methods4/17/2017
There are several basic methods for reducing harmonic voltage and current distortion from nonlinear distribution loads such as adjustable frequency drives (AFDs). Following is a description of each method, along with each method’s advantages and disadvantages.
Application Note: Troubleshooting A pH Electrode1/26/2011
Many factors affect performance of a pH electrode. When performance degrades, it is always a challenge for the analyst to identify the cause. Common troubleshooting procedures, which include evaluation of slope, electrode drift, time response, and accuracy, take considerable time. By Thermo Fisher Scientific
Defining Drinking Water Plant Backwash Profile Using The SOLITAX™ Sc Suspended Solids And Turbidity Sensor6/7/2013
Today’s drinking water plants have many challenges to meet as they produce water for a fast-growing and increasingly demanding population.
New Water Turbidity Measurement Technology — The US Experience2/3/2017
The amount of insoluble matter present in drinking water is an essential quality indicator. Silt, sand, bacteria, spores, and chemical precipitates all contribute to the cloudiness or turbidity of water. Drinking water (DW) which is highly turbid can be unpalatable and unsafe. Consumption of even low concentrations of certain bacteria and other microorganisms can cause serious health effects. Consequently, an accurate and sensitive measurement of turbidity is vital for ensuring that drinking water is free of these contaminants.
LATEST INSIGHTS ON DRINKING WATER
With Jeff Bezos announcing that he will be donating most of his wealth to philanthropic causes during his lifetime, I decided to repost my 2018 open letter to him on why his philanthropy should be directed towards water issues.
We often take our drinking water for granted. We always have access to running water, so we don't think much more about it. However, quality water is not always a guarantee. In fact, a number of cities are having issues with their water right now. The government creates laws to protect drinking water, and the EPA determines guidelines for how to ensure safe drinking water. Unfortunately, water quality issues may still arise that put you and your family at risk for disease — or worse. Let me share some of the most serious risks to your drinking water and how to solve them.
A Q&A with Will Sarni, founder and CEO of Water Foundry and founder and general partner of The Future of Water Fund. Part of a series of interviews from the 2022 Stockholm World Water Week with executives from different areas of the water sector.
With the meltdown of FTX and the price of Bitcoin sinking to a quarter of its high water mark of over $64,000 in value (now maybe two bit Bitcoin?), I decided to resurrect my 2018 post Is Cryptocurrency Going Down the Drain?...
Many people are familiar with flash floods — torrents that develop quickly after heavy rainfall. But there’s also such a thing as a flash drought, and these sudden, extreme dry spells are becoming a big concern for farmers and water utilities.
Digital payment platforms improve the efficiency of collections and related labor practices, but their greatest benefit may be enhancing utility-customer relations.
ABOUT DRINKING WATER
In most developed countries, drinking water is regulated to ensure that it meets drinking water quality standards. In the U.S., the Environmental Protection Agency (EPA) administers these standards under the Safe Drinking Water Act (SDWA).
Drinking water considerations can be divided into three core areas of concern:
- Source water for a community’s drinking water supply
- Drinking water treatment of source water
- Distribution of treated drinking water to consumers
Drinking Water Sources
Source water access is imperative to human survival. Sources may include groundwater from aquifers, surface water from rivers and streams and seawater through a desalination process. Direct or indirect water reuse is also growing in popularity in communities with limited access to sources of traditional surface or groundwater.
Source water scarcity is a growing concern as populations grow and move to warmer, less aqueous climates; climatic changes take place and industrial and agricultural processes compete with the public’s need for water. The scarcity of water supply and water conservation are major focuses of the American Water Works Association.
Drinking Water Treatment
Drinking Water Treatment involves the removal of pathogens and other contaminants from source water in order to make it safe for humans to consume. Treatment of public drinking water is mandated by the Environmental Protection Agency (EPA) in the U.S. Common examples of contaminants that need to be treated and removed from water before it is considered potable are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.
There are a variety of technologies and processes that can be used for contaminant removal and the removal of pathogens to decontaminate or treat water in a drinking water treatment plant before the clean water is pumped into the water distribution system for consumption.
The first stage in treating drinking water is often called pretreatment and involves screens to remove large debris and objects from the water supply. Aeration can also be used in the pretreatment phase. By mixing air and water, unwanted gases and minerals are removed and the water improves in color, taste and odor.
The second stage in the drinking water treatment process involves coagulation and flocculation. A coagulating agent is added to the water which causes suspended particles to stick together into clumps of material called floc. In sedimentation basins, the heavier floc separates from the water supply and sinks to form sludge, allowing the less turbid water to continue through the process.
During the filtration stage, smaller particles not removed by flocculation are removed from the treated water by running the water through a series of filters. Filter media can include sand, granulated carbon or manufactured membranes. Filtration using reverse osmosis membranes is a critical component of removing salt particles where desalination is being used to treat brackish water or seawater into drinking water.
Following filtration, the water is disinfected to kill or disable any microbes or viruses that could make the consumer sick. The most traditional disinfection method for treating drinking water uses chlorine or chloramines. However, new drinking water disinfection methods are constantly coming to market. Two disinfection methods that have been gaining traction use ozone and ultra-violet (UV) light to disinfect the water supply.
Drinking Water Distribution
Drinking water distribution involves the management of flow of the treated water to the consumer. By some estimates, up to 30% of treated water fails to reach the consumer. This water, often called non-revenue water, escapes from the distribution system through leaks in pipelines and joints, and in extreme cases through water main breaks.
A public water authority manages drinking water distribution through a network of pipes, pumps and valves and monitors that flow using flow, level and pressure measurement sensors and equipment.
Water meters and metering systems such as automatic meter reading (AMR) and advanced metering infrastructure (AMI) allows a water utility to assess a consumer’s water use and charge them for the correct amount of water they have consumed.